Nutrition Score: 86.43
Spinach is to kale what Michael Jordan is to LeBron James—the once unrivaled king now overshadowed by the hot new thing. But like MJ, spinach has a few more championship rings than its more current rival—primarily its position as a top source of biceps-building iron. According to the United States Department of Agriculture, a 180 gram serving of boiled spinach provides 6.43 mg of the muscle mineral—that’s more than a 6 oz hamburger patty! Recent research also suggest compounds in the leaf membranes called thylakoids may serve as a powerful appetite suppressant. A recently published long-term study at Lund University in Sweden found that having a drink containing thylakoids before breakfast could significantly reduce cravings and promote weight loss. On average, the women who took the spinach extract lost 5.5 pounds more than the placebo group over the course of three months.